Extending QDate, QTime and QDateTime

[jamadagni]

Dear all,

I have been trying to modify the qdatetime* files to the following ends:

1. Push the earliest date back to -4000 Jan 01 from a meaningless 1752 date
2. Allow the client programmer to read the internal representation in milliseconds of QTime
3. Rename QTime::mds and ds() to something more sensible.
4. Add a function to return a QTime value as a fraction of a day.
5. Add a function to return an astronomically valid Julian Day Number from a QDateTime value.

But somehow I am not able to get the stuff to compile correctly. There are too many errors to fit on screen. I have based my modifications on the Qt 4.11 qdatetime* code. Please help me with accomplishing my target successfully.

P.S: Another important matter -- when I modify a GPLed program, the resultant program is copyright me or the original author?